Castro Valley weather in January (California, United States of America)

What kind of temperatures can you expect in Castro Valley during January? Discover if this is the best time for your journey with our detailed monthly weather breakdown.

Temperatures

In January, Castro Valley usually has moderate temperatures and moderate rainfall. Winter occurs in January. The temperature during the day can rise to approximately 15°C. At night, it falls to around 5°C.

Precipitation

Castro Valley in January usually receives moderate rainfall, averaging around 75 mm for the month. On average, there are about 11 days with rain during this month.

Average sunshine

The month brings about 186 hours of sunlight, offering a comfortable mix of sun and shade.

If your ideal day consists of dry skies and moderate temperatures May, June, July, August, September and October generally stand out with the best circumstances. While December tends to showcase less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Castro Valley climate page with graphs.

 

Castro Valley, monthly averages in January

Min Temperature 5°C  

Max Temperature 15°C  

Chance of Rain 35%  

Precipitation 75 mm  

Rainy days 11 days  

Humidity 80% *  

Sunshine 186 hours *  

Percentage Sunshine 61% *  

Data from: San Francisco, the United States of America (27 KM, 17 Miles).

Where to go in the United States of America in January

Find out more about the weather in the United States of America and which places have the best travel conditions in this month.

Weather conditions Weather

Temperatures

Precipitation

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Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in this month?

Plan on layering your clothes. Some days or part of the day it will be nice and warm and some moments it can be a bit chilly. Bring a rain jacket in case it rains during your stay.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

5/10

Cycling

6/10

Walking

6/10

Camping

4/10

Outdoor sports

9/10

Interested in more climate information?

This site provides you with all the information you need about the climate in Castro Valley.

Our site offers climate and forecast data for every country in the world. Are you going to the United States of America? On this website you can find historical weather averages for many cities in the United States of America. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.